Happy birthday, iTunes Store! The music-buying platform, which later expanded to sell videos, mobile applications, and books, opened on April 28, 2003. Yahoo commissioned folk singer-songwriter Mike Doughty to write the service a little birthday song, which describes the key iTunes experience of downloading entire discographies in the wee hours of the morning while drunk. The song is not available via iTunes. [Yahoo Music] (Thanks, Angelos!)[More]